DOF control

[tricky]

On another note.

Another reason for getting less DOF in the vray camera is the conversion factor of Crop SLR cameras. If your SLR isn't a 35mm equivalent (full-frame), then the lens settings you are putting in to vray will need a conversion factor applying to them.

That is a point, but I'm only really messing woith settings to work out their effects.

It is related to one of the key differences between a photo taken with a decent dSLR and a run-of-the-mill compact camera with a tiny sensor: you don't get the same level of DOF control with the P&S camera.